Environment VariablesΒΆ

Mason can be configured by setting the following environment variables:

  • MASON_HOME : Path to a directory where mason will store cached registry and package data. Defaults to $HOME/.mason.

  • MASON_REGISTRY : A comma separated list of name|location pairs, where name is a local name for the registry at location. Defaults to mason-registry|https://github.com/chapel-lang/mason-registry. If the name| part of a pair is omitted it is inferred to be the word following the final slash in location with any .git suffix removed.

  • MASON_OFFLINE : A boolean value that prevents mason from making calls that require internet access when set to true. Defaults to false. Mason commands that support a --[no-]update flag can override the MASON_OFFLINE setting when --update is explicitly passed.

The mason env command will print the inferred or set values of these environment variables. If a variable was set by the user, an asterisk will be printed at the end of the line. For example, if $MASON_HOME was set:

> mason env
MASON_HOME: /path/to/something *
MASON_REGISTRY: mason-registry|https://github.com/chapel-lang/mason-registry


If MASON_REGISTRY changes after invoking a mason command that updates the local copy of the registry (e.g. mason update), the local copies of the registry and dependency sources will be removed.